Improvement in chimney-cowls



(gisten BENJAMIN IRRGANG, OF PHILADELPHIA, PENNSYLVANIA.

` 11mm Patent No. 83,166, daad 00am 2o, 186s.

IMPROVEMENT IN CHIMNEY-CQm'S.

The Schedule referred to these Letters Patent and making part of the same.

To all whom tt may concern Be it known that I, BENJAMIN Innenne, of Philadelphia, Pennsylvania, have invented an Improved Ventilating'Ohimney-Oap; and I do hereby declare the following to bea full, clear, and exact description of the same.

My invention relates to an improvement in that class of ventilating chimney-caps which are provided with hinged doors or flaps, to be opened or closed by the action of the Wind.

In order to enable others skilled in the art to make and apply my invention, I will now proceed to describe its construction and operation, reference'being had to the accompanying drawing, which forms a part of this specification, and in which- Figure l is a perspective view of my improved ventilating chimney-cap, and

Figure 2 a sectional elevation of the same.

The body,A, of the cap is square, viewed transversely, and is somewhat larger at` the top than at the bottom, so as to have inclined sides; and' extending' around its lower edge are ilanges, c, by means of which it is secured to the top of the chimney X.

A deiiector, C, of the form of an inverted cone, is

. secured to the under side of the top piece, l), of the cap;

and in each of the four sides of the latter, beneath the deilector, is an opening, b, to which is adaptedlia door or ilap, F.

Beneath each of the openings b, and riveted or otherwise secured to the sides of the cap, are two or more buttons, c c, which pass through holes near the lower edges of each of the doors F. The latter tlnn as eely upon these buttons as upon ordinary hinges, and the joint is not as liable to get out of order as if ordinary hinges were employed.

The dorms F have a constant tendency, by reason of the outward inclination of the sides of the cap, to moveA outward by their own gravity; and each door is prevented om moving beyond a given limit by a rod, d, whose opposite ends are secured to shields, c e, which project from the sides of the cap, at each side of each door.

`During acahn, or when there is not suflicient-wind to act upon the doors F, all ofthe latter, owing to the inclination of the sides of the cowl, will remain open,

as shown in the drawing, and the heated gases or air Y from the chimney are directed outwards by the delector C, and pass through all four of the openings b, and thence between the doors vF and the top piece, D, of. the cap.

Any current of air that would be strong enough to interfere with the draught, should it enter the chimney, will immediately close one or more of the doors F, according to its direction, the doors upon the opposite sides of the cap remaining open, and aording y I ample draught-passage.

The shields e c prevent the access of currents of air between the edges of the doors and the cap, in case the Wind should suddenly change its direction, while the disagreeable rattling which would result from the wind finding its way between the sides of the cowl and those doors which are closed, is prevented.

rlhe shields also prevent any of the doors, except those that are directly exposed to the action of the wind, from being opened or closed by the latter, and

thereby insure a more perfect draught in the chimney.v

IVithout claiming broadly a cowl having doors hinged at their lower edges, and acting independently of each other,

I claim as my invention, andA desire to secure by Letters Patent-- A ventilator or cowl, having inclined sides with openings, to which are iitted doors, hinged at their lower edges, and shields projecting from the cowl at the sides of the doors, all substantially as and for the purpose described.

In testimony whereof, I have signed my 'name to this specification' in the presence of two subscribing 

